Package rife.database.migrations

Class ReversibleDbMigration

java.lang.Object

rife.database.migrations.DbMigration

rife.database.migrations.ReversibleDbMigration

public abstract class ReversibleDbMigration
extends DbMigration

Provides a single declarative database migration that can be rolled back.

Extending this class instead of DbMigration is what makes a migration reversible. The reverse steps are declared in down() with the same add methods that DbMigration.up() uses, so that DbMigrations can execute them when the migration is rolled back.

Since:

1.10

See Also:

• DbMigration
• DbMigrations

Constructor Summary

Constructors

Constructor	Description
ReversibleDbMigration()

Method Summary

Modifier and Type	Method	Description
abstract void	down()	Declares the steps that reverse this migration.

Methods inherited from class rife.database.migrations.DbMigration

add, add, add, alterTable, createIndex, createSequence, createTable, createView, datasource, delete, dropIndex, dropSequence, dropTable, dropView, insert, truncate, up, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ReversibleDbMigration

public ReversibleDbMigration()

Method Details

down

public abstract void down()

Declares the steps that reverse this migration.

This method will be called while the steps of a rollback are being collected; you declare each of them by calling one of the add methods, typically undoing what DbMigration.up() declares in the opposite order.

Since:

1.10

See Also:

• DbMigration.up()